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McClymont E, Atkinson A, Albert A, Av-Gay G, Andrade J, Barrett J, Bogler T, Boucoiran I, Castillo E, D'Souza R, El-Chaâr D, Fadel S, Fell DB, Korchinski I, Kuret V, Ogilvie G, Poliquin V, Sadarangani M, Scott H, Snelgrove JW, Tunde-Byass M, Money D. Reactogenicity, pregnancy outcomes, and SARS-CoV-2 infection following COVID-19 vaccination during pregnancy in Canada: A national prospective cohort study. Vaccine 2023; 41:7183-7191. [PMID: 37865598 DOI: 10.1016/j.vaccine.2023.10.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 10/09/2023] [Accepted: 10/13/2023] [Indexed: 10/23/2023]
Abstract
OBJECTIVE To describe self-reported reactogenicity, pregnancy outcomes, and SARS-CoV-2 infection following COVID-19 vaccination during pregnancy. DESIGN National, prospective cohort study. SETTING Participants across Canada were enrolled from July 2021 until June 2022. POPULATION Individuals pregnant during the COVID-19 pandemic, regardless of vaccination status, were included. METHODS The Canadian COVID-19 Vaccine Registry for Pregnant and Lactating Individuals (COVERED) was advertised through traditional and social media. Surveys were administered at baseline, following each vaccine dose if vaccinated, pregnancy conclusion, and every two months for 14 months. Changes to pregnancy or vaccination status, SARS-CoV-2 infections, or significant health events were recorded. MAIN OUTCOME MEASURES Reactogenicity (local and systemic adverse events, and serious adverse events) within 1 week post-vaccination, pregnancy and neonatal outcomes, and subsequent SARS-CoV-2 infection. RESULTS Among 2868 participants who received 1-2 doses of a COVID-19 vaccine during pregnancy, adverse events described included: headache (19.5-33.9%), nausea (4.8-13.8%), fever (2.7-10.2%), and myalgia (33.4-42.2%). Reactogenicity was highest after the 2nd dose of vaccine in pregnancy. Compared to 1660 unvaccinated participants, there were no statistically significant differences in adverse pregnancy or infant outcomes, aside from an increased risk of NICU admission ≥ 24 h among the unvaccinated group. During follow-up, there was a higher rate of participant-reported SARS-CoV-2 infection in the unvaccinated compared to the vaccinated group (18[47.4%] vs. 786[27.3%]). CONCLUSIONS Participant-reported reactogenicity was similar to reports from non-pregnant adults. There was no increase in adverse pregnancy and birth outcomes among vaccinated vs. unvaccinated participants and lower rates of SARS-CoV-2 infection were reported in vaccinated participants. TWEETABLE ABSTRACT No significant increase in adverse pregnancy or infant outcomes among vaccinated versus unvaccinated pregnant women in Canada.
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Affiliation(s)
- E McClymont
- Department of Obstetrics & Gynecology, University of British Columbia, Vancouver, Canada
| | - A Atkinson
- Department of Obstetrics & Gynecology, University of British Columbia, Vancouver, Canada
| | - A Albert
- Women's Health Research Institute, Vancouver, Canada
| | - G Av-Gay
- Department of Obstetrics & Gynecology, University of British Columbia, Vancouver, Canada
| | - J Andrade
- Women's Health Research Institute, Vancouver, Canada
| | - J Barrett
- Department of Obstetrics & Gynecology, McMaster University, Hamilton, Canada
| | - T Bogler
- Department of Family & Community Medicine, University of Toronto, Toronto, Canada
| | - I Boucoiran
- Department of Obstetrics & Gynecology and School of Public Health, Université de Montréal, Montreal, Canada
| | - E Castillo
- Department of Obstetrics & Gynecology, University of Calgary, Calgary, Canada
| | - R D'Souza
- Department of Obstetrics & Gynecology, University of Toronto, Toronto, Canada
| | - D El-Chaâr
- Department of Obstetrics & Gynecology, University of Ottawa, Ottawa, Canada
| | - S Fadel
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - D B Fell
- School of Epidemiology & Public Health, University of Ottawa, Ottawa, Canada
| | - I Korchinski
- Women's Health Research Institute, Vancouver, Canada
| | - V Kuret
- Department of Obstetrics & Gynecology, University of Calgary, Calgary, Canada
| | - G Ogilvie
- School of Population & Public Health, University of British Columbia, Vancouver, Canada
| | - V Poliquin
- Department of Obstetrics, Gynecology, & Reproductive Sciences, University of Manitoba, Winnipeg, Canada
| | - M Sadarangani
- Vaccine Evaluation Center, BC Children's Hospital Research Institute, Vancouver, Canada
| | - H Scott
- Department of Obstetrics & Gynecology, Dalhousie University, Halifax, Canada
| | - J W Snelgrove
- Department of Obstetrics & Gynecology, University of Toronto, Toronto, Canada
| | - M Tunde-Byass
- Department of Obstetrics & Gynecology, University of Toronto, Toronto, Canada
| | - D Money
- Department of Obstetrics & Gynecology, University of British Columbia, Vancouver, Canada; Women's Health Research Institute, Vancouver, Canada.
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